libwebsockets
Lightweight C library for HTML5 websockets
lws-http.h
1 /*
2  * libwebsockets - small server side websockets and web server implementation
3  *
4  * Copyright (C) 2010 - 2020 Andy Green <andy@warmcat.com>
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a copy
7  * of this software and associated documentation files (the "Software"), to
8  * deal in the Software without restriction, including without limitation the
9  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10  * sell copies of the Software, and to permit persons to whom the Software is
11  * furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22  * IN THE SOFTWARE.
23  */
24 
25 /* minimal space for typical headers and CSP stuff */
26 
27 #define LWS_RECOMMENDED_MIN_HEADER_SPACE 2048
28 
34 
41 
53 LWS_VISIBLE LWS_EXTERN const char *
54 lws_get_mimetype(const char *file, const struct lws_http_mount *m);
55 
74 LWS_VISIBLE LWS_EXTERN int
75 lws_serve_http_file(struct lws *wsi, const char *file, const char *content_type,
76  const char *other_headers, int other_headers_len);
77 
78 LWS_VISIBLE LWS_EXTERN int
79 lws_serve_http_file_fragment(struct lws *wsi);
81 
82 
83 enum http_status {
84  HTTP_STATUS_CONTINUE = 100,
85 
86  HTTP_STATUS_OK = 200,
87  HTTP_STATUS_NO_CONTENT = 204,
88  HTTP_STATUS_PARTIAL_CONTENT = 206,
89 
90  HTTP_STATUS_MOVED_PERMANENTLY = 301,
91  HTTP_STATUS_FOUND = 302,
92  HTTP_STATUS_SEE_OTHER = 303,
93  HTTP_STATUS_NOT_MODIFIED = 304,
94 
95  HTTP_STATUS_BAD_REQUEST = 400,
96  HTTP_STATUS_UNAUTHORIZED,
97  HTTP_STATUS_PAYMENT_REQUIRED,
98  HTTP_STATUS_FORBIDDEN,
99  HTTP_STATUS_NOT_FOUND,
100  HTTP_STATUS_METHOD_NOT_ALLOWED,
101  HTTP_STATUS_NOT_ACCEPTABLE,
102  HTTP_STATUS_PROXY_AUTH_REQUIRED,
103  HTTP_STATUS_REQUEST_TIMEOUT,
104  HTTP_STATUS_CONFLICT,
105  HTTP_STATUS_GONE,
106  HTTP_STATUS_LENGTH_REQUIRED,
107  HTTP_STATUS_PRECONDITION_FAILED,
108  HTTP_STATUS_REQ_ENTITY_TOO_LARGE,
109  HTTP_STATUS_REQ_URI_TOO_LONG,
110  HTTP_STATUS_UNSUPPORTED_MEDIA_TYPE,
111  HTTP_STATUS_REQ_RANGE_NOT_SATISFIABLE,
112  HTTP_STATUS_EXPECTATION_FAILED,
113 
114  HTTP_STATUS_INTERNAL_SERVER_ERROR = 500,
115  HTTP_STATUS_NOT_IMPLEMENTED,
116  HTTP_STATUS_BAD_GATEWAY,
117  HTTP_STATUS_SERVICE_UNAVAILABLE,
118  HTTP_STATUS_GATEWAY_TIMEOUT,
119  HTTP_STATUS_HTTP_VERSION_NOT_SUPPORTED,
120 };
131 
133  char *p;
134  int len;
135  int max_len;
136  int final;
137  int chunked;
139 };
140 
141 typedef const char *(*lws_process_html_state_cb)(void *data, int index);
142 
144  char *start;
145  char swallow[16];
146  int pos;
147  void *data;
148  const char * const *vars;
151  lws_process_html_state_cb replace;
153 };
154 
159 LWS_VISIBLE LWS_EXTERN int
160 lws_chunked_html_process(struct lws_process_html_args *args,
161  struct lws_process_html_state *s);
163 
197 
204 struct lws_tokens {
205  unsigned char *token;
206  int len;
207 };
208 
209 /* enum lws_token_indexes
210  * these have to be kept in sync with lextable.h / minilex.c
211  *
212  * NOTE: These public enums are part of the abi. If you want to add one,
213  * add it at where specified so existing users are unaffected.
214  */
215 enum lws_token_indexes {
216  WSI_TOKEN_GET_URI, /* 0 */
217  WSI_TOKEN_POST_URI,
218 #if defined(LWS_WITH_HTTP_UNCOMMON_HEADERS) || defined(LWS_HTTP_HEADERS_ALL)
219  WSI_TOKEN_OPTIONS_URI,
220 #endif
221  WSI_TOKEN_HOST,
222  WSI_TOKEN_CONNECTION,
223  WSI_TOKEN_UPGRADE, /* 5 */
224  WSI_TOKEN_ORIGIN,
225 #if defined(LWS_ROLE_WS) || defined(LWS_HTTP_HEADERS_ALL)
226  WSI_TOKEN_DRAFT,
227 #endif
228  WSI_TOKEN_CHALLENGE,
229 #if defined(LWS_ROLE_WS) || defined(LWS_HTTP_HEADERS_ALL)
230  WSI_TOKEN_EXTENSIONS,
231  WSI_TOKEN_KEY1, /* 10 */
232  WSI_TOKEN_KEY2,
233  WSI_TOKEN_PROTOCOL,
234  WSI_TOKEN_ACCEPT,
235  WSI_TOKEN_NONCE,
236 #endif
237  WSI_TOKEN_HTTP,
238 #if defined(LWS_ROLE_H2) || defined(LWS_HTTP_HEADERS_ALL)
239  WSI_TOKEN_HTTP2_SETTINGS, /* 16 */
240 #endif
241  WSI_TOKEN_HTTP_ACCEPT,
242 #if defined(LWS_WITH_HTTP_UNCOMMON_HEADERS) || defined(LWS_HTTP_HEADERS_ALL)
243  WSI_TOKEN_HTTP_AC_REQUEST_HEADERS,
244 #endif
245  WSI_TOKEN_HTTP_IF_MODIFIED_SINCE,
246  WSI_TOKEN_HTTP_IF_NONE_MATCH, /* 20 */
247  WSI_TOKEN_HTTP_ACCEPT_ENCODING,
248  WSI_TOKEN_HTTP_ACCEPT_LANGUAGE,
249  WSI_TOKEN_HTTP_PRAGMA,
250  WSI_TOKEN_HTTP_CACHE_CONTROL,
251  WSI_TOKEN_HTTP_AUTHORIZATION,
252  WSI_TOKEN_HTTP_COOKIE,
253  WSI_TOKEN_HTTP_CONTENT_LENGTH, /* 27 */
254  WSI_TOKEN_HTTP_CONTENT_TYPE,
255  WSI_TOKEN_HTTP_DATE,
256  WSI_TOKEN_HTTP_RANGE,
257 #if defined(LWS_WITH_HTTP_UNCOMMON_HEADERS) || defined(LWS_ROLE_H2) || defined(LWS_HTTP_HEADERS_ALL)
258  WSI_TOKEN_HTTP_REFERER,
259 #endif
260 #if defined(LWS_ROLE_WS) || defined(LWS_HTTP_HEADERS_ALL)
261  WSI_TOKEN_KEY,
262  WSI_TOKEN_VERSION,
263  WSI_TOKEN_SWORIGIN,
264 #endif
265 #if defined(LWS_ROLE_H2) || defined(LWS_HTTP_HEADERS_ALL)
266  WSI_TOKEN_HTTP_COLON_AUTHORITY,
267  WSI_TOKEN_HTTP_COLON_METHOD,
268  WSI_TOKEN_HTTP_COLON_PATH,
269  WSI_TOKEN_HTTP_COLON_SCHEME,
270  WSI_TOKEN_HTTP_COLON_STATUS,
271 #endif
272 
273 #if defined(LWS_WITH_HTTP_UNCOMMON_HEADERS) || defined(LWS_ROLE_H2) || defined(LWS_HTTP_HEADERS_ALL)
274  WSI_TOKEN_HTTP_ACCEPT_CHARSET,
275 #endif
276  WSI_TOKEN_HTTP_ACCEPT_RANGES,
277 #if defined(LWS_WITH_HTTP_UNCOMMON_HEADERS) || defined(LWS_ROLE_H2) || defined(LWS_HTTP_HEADERS_ALL)
278  WSI_TOKEN_HTTP_ACCESS_CONTROL_ALLOW_ORIGIN,
279 #endif
280  WSI_TOKEN_HTTP_AGE,
281  WSI_TOKEN_HTTP_ALLOW,
282  WSI_TOKEN_HTTP_CONTENT_DISPOSITION,
283  WSI_TOKEN_HTTP_CONTENT_ENCODING,
284  WSI_TOKEN_HTTP_CONTENT_LANGUAGE,
285  WSI_TOKEN_HTTP_CONTENT_LOCATION,
286  WSI_TOKEN_HTTP_CONTENT_RANGE,
287  WSI_TOKEN_HTTP_ETAG,
288  WSI_TOKEN_HTTP_EXPECT,
289  WSI_TOKEN_HTTP_EXPIRES,
290  WSI_TOKEN_HTTP_FROM,
291  WSI_TOKEN_HTTP_IF_MATCH,
292  WSI_TOKEN_HTTP_IF_RANGE,
293  WSI_TOKEN_HTTP_IF_UNMODIFIED_SINCE,
294  WSI_TOKEN_HTTP_LAST_MODIFIED,
295  WSI_TOKEN_HTTP_LINK,
296  WSI_TOKEN_HTTP_LOCATION,
297 #if defined(LWS_WITH_HTTP_UNCOMMON_HEADERS) || defined(LWS_ROLE_H2) || defined(LWS_HTTP_HEADERS_ALL)
298  WSI_TOKEN_HTTP_MAX_FORWARDS,
299  WSI_TOKEN_HTTP_PROXY_AUTHENTICATE,
300  WSI_TOKEN_HTTP_PROXY_AUTHORIZATION,
301 #endif
302  WSI_TOKEN_HTTP_REFRESH,
303  WSI_TOKEN_HTTP_RETRY_AFTER,
304  WSI_TOKEN_HTTP_SERVER,
305  WSI_TOKEN_HTTP_SET_COOKIE,
306 #if defined(LWS_WITH_HTTP_UNCOMMON_HEADERS) || defined(LWS_ROLE_H2) || defined(LWS_HTTP_HEADERS_ALL)
307  WSI_TOKEN_HTTP_STRICT_TRANSPORT_SECURITY,
308 #endif
309  WSI_TOKEN_HTTP_TRANSFER_ENCODING,
310 #if defined(LWS_WITH_HTTP_UNCOMMON_HEADERS) || defined(LWS_ROLE_H2) || defined(LWS_HTTP_HEADERS_ALL)
311  WSI_TOKEN_HTTP_USER_AGENT,
312  WSI_TOKEN_HTTP_VARY,
313  WSI_TOKEN_HTTP_VIA,
314  WSI_TOKEN_HTTP_WWW_AUTHENTICATE,
315 #endif
316 #if defined(LWS_WITH_HTTP_UNCOMMON_HEADERS) || defined(LWS_HTTP_HEADERS_ALL)
317  WSI_TOKEN_PATCH_URI,
318  WSI_TOKEN_PUT_URI,
319  WSI_TOKEN_DELETE_URI,
320 #endif
321 
322  WSI_TOKEN_HTTP_URI_ARGS,
323 #if defined(LWS_WITH_HTTP_UNCOMMON_HEADERS) || defined(LWS_HTTP_HEADERS_ALL)
324  WSI_TOKEN_PROXY,
325  WSI_TOKEN_HTTP_X_REAL_IP,
326 #endif
327  WSI_TOKEN_HTTP1_0,
328  WSI_TOKEN_X_FORWARDED_FOR,
329  WSI_TOKEN_CONNECT,
330  WSI_TOKEN_HEAD_URI,
331 #if defined(LWS_WITH_HTTP_UNCOMMON_HEADERS) || defined(LWS_ROLE_H2) || defined(LWS_HTTP_HEADERS_ALL)
332  WSI_TOKEN_TE,
333  WSI_TOKEN_REPLAY_NONCE, /* ACME */
334 #endif
335 #if defined(LWS_ROLE_H2) || defined(LWS_HTTP_HEADERS_ALL)
336  WSI_TOKEN_COLON_PROTOCOL,
337 #endif
338  WSI_TOKEN_X_AUTH_TOKEN,
339  WSI_TOKEN_DSS_SIGNATURE,
340 
341  /****** add new things just above ---^ ******/
342 
343  /* use token storage to stash these internally, not for
344  * user use */
345 
346  _WSI_TOKEN_CLIENT_SENT_PROTOCOLS,
347  _WSI_TOKEN_CLIENT_PEER_ADDRESS,
348  _WSI_TOKEN_CLIENT_URI,
349  _WSI_TOKEN_CLIENT_HOST,
350  _WSI_TOKEN_CLIENT_ORIGIN,
351  _WSI_TOKEN_CLIENT_METHOD,
352  _WSI_TOKEN_CLIENT_IFACE,
353  _WSI_TOKEN_CLIENT_ALPN,
354 
355  /* always last real token index*/
356  WSI_TOKEN_COUNT,
357 
358  /* parser state additions, no storage associated */
359  WSI_TOKEN_NAME_PART,
360 #if defined(LWS_WITH_CUSTOM_HEADERS) || defined(LWS_HTTP_HEADERS_ALL)
361  WSI_TOKEN_UNKNOWN_VALUE_PART,
362 #endif
363  WSI_TOKEN_SKIPPING,
364  WSI_TOKEN_SKIPPING_SAW_CR,
365  WSI_PARSING_COMPLETE,
366  WSI_INIT_TOKEN_MUXURL,
367 };
368 
370  unsigned short token_limit[WSI_TOKEN_COUNT];
371 };
372 
373 enum lws_h2_settings {
374  H2SET_HEADER_TABLE_SIZE = 1,
375  H2SET_ENABLE_PUSH,
376  H2SET_MAX_CONCURRENT_STREAMS,
377  H2SET_INITIAL_WINDOW_SIZE,
378  H2SET_MAX_FRAME_SIZE,
379  H2SET_MAX_HEADER_LIST_SIZE,
380  H2SET_RESERVED7,
381  H2SET_ENABLE_CONNECT_PROTOCOL, /* defined in mcmanus-httpbis-h2-ws-02 */
382 
383  H2SET_COUNT /* always last */
384 };
385 
391 LWS_VISIBLE LWS_EXTERN const unsigned char *
392 lws_token_to_string(enum lws_token_indexes token);
393 
402 LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT
403 lws_hdr_total_length(struct lws *wsi, enum lws_token_indexes h);
404 
414 LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT
415 lws_hdr_fragment_length(struct lws *wsi, enum lws_token_indexes h,
416  int frag_idx);
417 
432 LWS_VISIBLE LWS_EXTERN int
433 lws_hdr_copy(struct lws *wsi, char *dest, int len, enum lws_token_indexes h);
434 
452 LWS_VISIBLE LWS_EXTERN int
453 lws_hdr_copy_fragment(struct lws *wsi, char *dest, int len,
454  enum lws_token_indexes h, int frag_idx);
455 
472 LWS_VISIBLE LWS_EXTERN int
473 lws_hdr_custom_length(struct lws *wsi, const char *name, int nlen);
474 
493 LWS_VISIBLE LWS_EXTERN int
494 lws_hdr_custom_copy(struct lws *wsi, char *dst, int len, const char *name,
495  int nlen);
496 
520 LWS_VISIBLE LWS_EXTERN int
521 lws_get_urlarg_by_name_safe(struct lws *wsi, const char *name, char *buf, int len);
522 
540 LWS_VISIBLE LWS_EXTERN const char *
541 lws_get_urlarg_by_name(struct lws *wsi, const char *name, char *buf, int len)
542 /* LWS_WARN_DEPRECATED */;
544 
560 
561 #define LWSAHH_CODE_MASK ((1 << 16) - 1)
562 #define LWSAHH_FLAG_NO_SERVER_NAME (1 << 30)
563 
578 LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT
580  unsigned int code, unsigned char **p,
581  unsigned char *end);
594 LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT
595 lws_add_http_header_by_name(struct lws *wsi, const unsigned char *name,
596  const unsigned char *value, int length,
597  unsigned char **p, unsigned char *end);
611 LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT
612 lws_add_http_header_by_token(struct lws *wsi, enum lws_token_indexes token,
613  const unsigned char *value, int length,
614  unsigned char **p, unsigned char *end);
625 LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT
627  lws_filepos_t content_length,
628  unsigned char **p, unsigned char *end);
638 LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT
639 lws_finalize_http_header(struct lws *wsi, unsigned char **p,
640  unsigned char *end);
641 
653 LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT
654 lws_finalize_write_http_header(struct lws *wsi, unsigned char *start,
655  unsigned char **p, unsigned char *end);
656 
657 #define LWS_ILLEGAL_HTTP_CONTENT_LEN ((lws_filepos_t)-1ll)
658 
685 LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT
686 lws_add_http_common_headers(struct lws *wsi, unsigned int code,
687  const char *content_type, lws_filepos_t content_len,
688  unsigned char **p, unsigned char *end);
689 
690 enum {
691  LWSHUMETH_GET,
692  LWSHUMETH_POST,
693  LWSHUMETH_OPTIONS,
694  LWSHUMETH_PUT,
695  LWSHUMETH_PATCH,
696  LWSHUMETH_DELETE,
697  LWSHUMETH_CONNECT,
698  LWSHUMETH_HEAD,
699  LWSHUMETH_COLON_PATH,
700 };
701 
715 LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT
716 lws_http_get_uri_and_method(struct lws *wsi, char **puri_ptr, int *puri_len);
717 
719 
730 
741 LWS_VISIBLE LWS_EXTERN const char *
742 lws_urlencode(char *escaped, const char *string, int len);
743 
744 /*
745  * URLDECODE 1 / 2
746  *
747  * This simple urldecode only operates until the first '\0' and requires the
748  * data to exist all at once
749  */
765 LWS_VISIBLE LWS_EXTERN int
766 lws_urldecode(char *string, const char *escaped, int len);
768 
779 LWS_VISIBLE LWS_EXTERN int
780 lws_http_date_render_from_unix(char *buf, size_t len, const time_t *t);
781 
792 LWS_VISIBLE LWS_EXTERN int
793 lws_http_date_parse_unix(const char *b, size_t len, time_t *t);
794 
813 LWS_VISIBLE LWS_EXTERN int
814 lws_http_check_retry_after(struct lws *wsi, lws_usec_t *us_interval_in_out);
815 
825 LWS_VISIBLE LWS_EXTERN int
826 lws_return_http_status(struct lws *wsi, unsigned int code,
827  const char *html_body);
828 
841 LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT
842 lws_http_redirect(struct lws *wsi, int code, const unsigned char *loc, int len,
843  unsigned char **p, unsigned char *end);
844 
853 LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT
854 lws_http_transaction_completed(struct lws *wsi);
855 
863 LWS_VISIBLE LWS_EXTERN int
864 lws_http_headers_detach(struct lws *wsi);
865 
874 LWS_VISIBLE LWS_EXTERN int
875 lws_http_mark_sse(struct lws *wsi);
876 
892 LWS_VISIBLE LWS_EXTERN int
893 lws_h2_client_stream_long_poll_rxonly(struct lws *wsi);
894 
920 LWS_VISIBLE LWS_EXTERN int
921 lws_http_compression_apply(struct lws *wsi, const char *name,
922  unsigned char **p, unsigned char *end, char decomp);
923 
932 LWS_VISIBLE LWS_EXTERN int
933 lws_http_is_redirected_to_get(struct lws *wsi);
934 
952 LWS_VISIBLE LWS_EXTERN int
953 lws_http_cookie_get(struct lws *wsi, const char *name, char *buf, size_t *max);
954 
963 #define lws_http_client_http_resp_is_error(code) (!(code < 400))
964 
990 #define LWS_H2_STREAM_SID -1
991 LWS_VISIBLE LWS_EXTERN int
992 lws_h2_update_peer_txcredit(struct lws *wsi, unsigned int sid, int bump);
993 
994 
1006 LWS_VISIBLE LWS_EXTERN int
1007 lws_h2_get_peer_txcredit_estimate(struct lws *wsi);
1008 
1010 
LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT lws_finalize_write_http_header(struct lws *wsi, unsigned char *start, unsigned char **p, unsigned char *end)
LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT lws_add_http_header_status(struct lws *wsi, unsigned int code, unsigned char **p, unsigned char *end)
LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT lws_add_http_header_by_name(struct lws *wsi, const unsigned char *name, const unsigned char *value, int length, unsigned char **p, unsigned char *end)
LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT lws_finalize_http_header(struct lws *wsi, unsigned char **p, unsigned char *end)
LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT lws_add_http_common_headers(struct lws *wsi, unsigned int code, const char *content_type, lws_filepos_t content_len, unsigned char **p, unsigned char *end)
LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT lws_http_get_uri_and_method(struct lws *wsi, char **puri_ptr, int *puri_len)
LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT lws_add_http_header_content_length(struct lws *wsi, lws_filepos_t content_length, unsigned char **p, unsigned char *end)
LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT lws_add_http_header_by_token(struct lws *wsi, enum lws_token_indexes token, const unsigned char *value, int length, unsigned char **p, unsigned char *end)
LWS_VISIBLE LWS_EXTERN int lws_hdr_custom_copy(struct lws *wsi, char *dst, int len, const char *name, int nlen)
LWS_VISIBLE LWS_EXTERN const unsigned char * lws_token_to_string(enum lws_token_indexes token)
LWS_VISIBLE LWS_EXTERN int lws_get_urlarg_by_name_safe(struct lws *wsi, const char *name, char *buf, int len)
LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT lws_hdr_fragment_length(struct lws *wsi, enum lws_token_indexes h, int frag_idx)
LWS_VISIBLE LWS_EXTERN int lws_hdr_custom_length(struct lws *wsi, const char *name, int nlen)
LWS_VISIBLE LWS_EXTERN int lws_hdr_copy(struct lws *wsi, char *dest, int len, enum lws_token_indexes h)
LWS_VISIBLE LWS_EXTERN const char * lws_get_urlarg_by_name(struct lws *wsi, const char *name, char *buf, int len)
LWS_VISIBLE LWS_EXTERN int LWS_WARN_UNUSED_RESULT lws_hdr_total_length(struct lws *wsi, enum lws_token_indexes h)
LWS_VISIBLE LWS_EXTERN int lws_hdr_copy_fragment(struct lws *wsi, char *dest, int len, enum lws_token_indexes h, int frag_idx)
Definition: lws-context-vhost.h:1228
Definition: lws-http.h:132
int chunked
Definition: lws-http.h:137
char * p
Definition: lws-http.h:133
int len
Definition: lws-http.h:134
int max_len
Definition: lws-http.h:135
Definition: lws-http.h:143
const char *const * vars
Definition: lws-http.h:148
int pos
Definition: lws-http.h:146
lws_process_html_state_cb replace
Definition: lws-http.h:151
char swallow[16]
Definition: lws-http.h:145
int count_vars
Definition: lws-http.h:149
char * start
Definition: lws-http.h:144
void * data
Definition: lws-http.h:147
Definition: lws-http.h:369
unsigned short token_limit[WSI_TOKEN_COUNT]
Definition: lws-http.h:370
Definition: lws-http.h:204
int len
Definition: lws-http.h:206
unsigned char * token
Definition: lws-http.h:205